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A review of the scientific work of Harry Luman Russell, together with a list of his books and scientific papers, by E. G. Hastings.--The development of city milk supply problems, by H. A. Harding.--The resistance of mold spores to the action of sunlight, by J. Weinzirl.--The influence of the plane of nutrition upon the percentage of fat in milk and the properties of the fat, by C. H. Eckles.--Characteristics and distribution of the colon-aerogenes group, by L. A. Rogers.--The identity of American and French sporotrichosis, by D. J. Davis.--The significance of yeasts and oidia in pasteurized butter, by F. W. Bouska and J. C. Brown.--The action of certain bacteria on the nitrogenous material of sewage, by E. G. Birge.--The detection of pasteurized milk, by W. D. Frost.--The investigation of drinking water supplies, by H. A. Whittaker.--The milk supply of Chicago, by A. L. Amott.--The bacteriology of ice cream, by B. W. Hammer